CVE-2021-47211

ALSA: usb-audio: fix null pointer dereference on pointer cs_desc

Published Apr 10, 2024 CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Description
In the Linux kernel, the following vulnerability has been resolved:

ALSA: usb-audio: fix null pointer dereference on pointer cs_desc

The pointer cs_desc return from snd_usb_find_clock_source could
be null, so there is a potential null pointer dereference issue.
Fix this by adding a null check before dereference.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DLA Debian DLA DLA-4664-1 linux security update
Ubuntu USN Ubuntu USN USN-7553-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7553-2 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7553-3 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7553-4 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7553-5 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7553-6 Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7554-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7554-2 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7554-3 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7585-1 Linux kernel vulnerabilities
Ubuntu USN Ubuntu USN USN-7585-2 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7585-3 Linux kernel (FIPS) vulnerabilities
Ubuntu USN Ubuntu USN USN-7585-4 Linux kernel (Azure) vulnerabilities
Ubuntu USN Ubuntu USN USN-7585-5 Linux kernel (HWE) vulnerabilities
Ubuntu USN Ubuntu USN USN-7585-6 Linux kernel (BlueField) vulnerabilities
Ubuntu USN Ubuntu USN USN-7585-7 Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN Ubuntu USN USN-7640-1 Linux kernel (IoT) vulnerabilities
History
Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
Metrics cvssV3_1

{'score': 4.4, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H'}

cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Linux
Published
Updated
Jun 19, 2026, 11:57 AM
Reserved
Apr 10, 2024, 6:59 PM
Status
Modified
Published
Apr 10, 2024, 7:15 PM
Modified
Jun 19, 2026, 1:16 PM
Severity
Low
Public date
Apr 10, 2024, 12:00 AM